Cooler



FIG. 1 is an upper perspective view of an embodiment of a cooler;

FIG. 2 is a lower perspective view of the cooler;

FIG. 3 is a front view of the cooler;

FIG. 4 is a rear view of the cooler;

FIG. 5 is a left side view of the cooler;

FIG. 6 is a right side view of the cooler;

FIG. 7 is a top view of the cooler; and,

FIG. 8 is a bottom view of the cooler.

The broken lines form no part of the claimed design. 

CLAIM The ornamental design for a cooler, as shown and described. 